There's currently an open issue for this
https://github.com/sympy/sympy/issues/5855.
For now, I think the only way to do it is to manually subclass MatrixExpr.
Aaron Meurer
On Mon, Oct 24, 2022 at 6:52 AM Anton Akhmerov <anton.akhme...@gmail.com> wrote:
>
> Hello everyone,
>
> I would like to represent a symbolic function whose argument is a matrix
> symbol and so is its output. To make a specific example, I would like an
> expression like to define F, such that F(X) + X works if X is a
> MatrixSymbol("X", n, n).
>
> The closest that I was able to find in the docs is FunctionMatrix, but it
> doesn't quite get me there. Using F = sympy.Function("F") does not work
> neither.
>
> Is there a way to achieve the desired result?
>
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